Zonguldak deniz suyunda ve sedimentlerinde ağır metal seviyeleri

Bu çalışmada Karadeniz kıyısındaki illerden olan Zonguldak deniz suyunda ve dip çamurunda ağır metal seviyeleri ölçüldü. Örnekler endüstriyel alanlardan ve şehir plajlarından toplanmıştır. Deniz suyunda çözünmüş metal konsantrasyonları Çatalağzı termik santralı kıyısında (nM) Cd 15.0±0.98, Alaplı deresinde Cr 112±8.6, Filyos çayında Mn 715±8.3, Zonguldak plajlarında Cu 122±1.5, Ni 142±10.6, Pb 39±9.0 ve Zn 834±4.1 maksimum değerler olarak bulunmuştur. Dip çamurunda bulunan ortalama konsantrasyonlar ise (Lig/g) Cd=0.47±0.34, Cr=67.95±27,6, Cu=30.21±9.27, Mn=274.4±74.8, Ni=37.03±13.25, Pb=39.14±l 1.22, Zn=84.6±l8.5 şeklindedir. Kirlilik seviyeleri diğer US EPA limitleriyle ve diğer Karadeniz şehirleri ve devletlerine ait değerler ile karşılaştırılmış ve Zonguldak diğer Karadeniz devletleri kıyılarından daha kadar kirli bulunmuştur. Bu arada Rize ve Hopa kıyılarının benzer kirliliğe sahip olduğu bulunmuştur. Bu çalışmada deniz suyundaki öncelikli toksik metallerin (Cd, Cu, Ni, Pb ve Zn) seviyeleri tavsiye edilen değerlerin üzerinde olduğu saptanmıştır. Sedimentteki metal seviyeleri ise diğer ülkelerin örnekleri kadar kirli bulunmuştur.Heavy metal levels were measured in seawater and sediment in Zonguldak which is on the Black sea shore of Turkey. The samples were collected near the industrial areas and city beaches. Maximum concentrations of metals dissolved in seawater were found (nM) Cd 15.0±0.98 around Çatalağzı Power Station, Cr 112±8.6 in Alaplı Creek delta, Mn 715±8.3 in Filyos creek delta, Cu 122±1.5, Ni 142±10.6, Pb 39±9.0 and Zn 834±4.1in Zonguldak city beaches. Heavy metal levels in sediment were found as (μg/g) Cd 0.47±0.34, Cr 67.95±27.6, Cu 30.21±9.27, Mn 274.4±74.8, Ni 37.03±13.25, Pb 39.14±11.22, and Zn 84.6±18.5. Heavy metal concentrations were compared with the US EPA limitations and the other localities and seawater found to be highly polluted than the other Black Sea shores and similar to Rize and Hopa waters. According to recommendations of US EPA under the priority toxic pollutants list Cd, Cu, Ni, Pb and Zn levels are above the limits in Zonguldak seawater. Metal levels in sediment samples were found as polluted as the estuarine areas of other countries in the region

Source identification of Polycyclic Aromatic Hydrocarbons (PAHs) in the urban environment of İstanbul

In this study, İstanbul-Tuzla Region atmosphere is selected as the working area because of this region contains shipyards and shipyard-related side product industries. To examine the PAHs as atmospheric inputs, 46 ambient air samples were collected in Tuzla region of Istanbul, Turkey at 2010. The sample collection was carried out as monthly. Additionally, the volume of the air was drawn and meteorological data recorded. The PAH concentrations were classified as hot and cold season samples. Due to the particle-bond character of PAHs and condensation in cold, the high concentrations were encountered in winter months. Monthly average total PAH concentrations fluctuated between 7.4 ng m-3 (in March)-0.05 ng m-3 (in August). The concentrations of total PAHs in cold season were almost hundred times higher than those in hot season. The fossil fuel (gasoline and diesel fuel) combustion was found to be the main source of PAHs

The sources of metal contents in the shelf sediments from the Marmara Sea, Turkey

The shelf area is the largest morphological unit of the Marmara Sea and is subjected to increasing population, urbanization, and industrial activities. Metal contents (Al, Fe, Mn, Cu, Pb, Zn, Ni, Cr, Co and Hg) of the surface sediments from the shelf areas of the Marmara Sea generally do not indicate shelf-wide pollution. The variability of the metal contents of the shelf sediments is mainly governed by the geochemical differences in the northern and southern hinterlands. Northern shelf sediments contain lower values compared to those of the southern shelf, where higher Ni, Cr, Pb, Cu and Zn are derived from the rock formations and mineralized zones. However, besides from the natural high background in the southern shelf, some anthropogenic influences are evident from EF values of Pb, Zn and Cu, and also from their high mobility in the semi-isolated bay sediments. Anthropogenic influences are found to be limited at the confluence of Istanbul Strait in the northern shelf. However, suspended sediments along the shallow parts of the northern shelf were found to be enriched in Pb and Hg and to a lesser degree in Zn, reflecting anthropogenic inputs from Istanbul Metropolitan and possibly from the Black Sea via the Istanbul Strait